36results about How to "Meet liquidity requirements" patented technology

The invention relates to the technical field of magnetic proximity switches, in particular to a low-pressure injection molding magnetic proximity switch, which comprises a plastic box, a reed switch and an inlet and outlet lead, wherein an opening is formed in the upper end of the plastic box; two threading slots are formed in the right end wall of the plastic box; a wire fixing pinch plate is arranged at the inner side of the left end wall of the plastic box; the wire fixing pinch plate is matched with the lateral wall of the plastic box to form a wire fixing opening; the inlet and outlet lead is electrically connected with two pins of the reed switch respectively; one pin of the reed switch is fixedly arranged in the wire fixing opening; and the inlet and outlet lead is transversely led out from the corresponding threading slot. The low-pressure injection molding magnetic proximity switch is reasonable in structure; one pin of the reed switch is integrally connected with the lead through a rivet; the electric connection strength is high; and the performance is stable. The rivet at one end of the reed switch is arranged in the wire fixing opening in a penetrating manner; the other end of the reed switch is limited through the positions of a wire clamping hole and a rib plate, so that the assembly position of the reed switch in an inner cavity of the plastic box is reasonable; a low-pressure injection molding process is achieved; and the impact strength and the electrical stability of the reed switch can be effectively improved.

The invention provides epoxy rubber composite modified asphalt and a preparation method thereof. The epoxy rubber composite modified asphalt comprises the following components in parts by weight: 10-70 parts of epoxy resin, 5-20 parts of rubber powder, 30-90 parts of asphalt, 0-10 parts of regulating oil, 1-5 parts of a viscosity reducer and 0.1-0.5 part of a composite stabilizer. The epoxy rubber composite modified asphalt has the remarkable technical characteristics of being adjustable in rigidity, low in viscosity in the construction process, high in viscosity and elasticity under the service condition, good in high-temperature stability, high in durability, energy-saving and environment-friendly.

The invention discloses a preparation method of fly ash-waste glass powder inorganic polymer silt-solidifying material. The preparation method includes: mixing fly ash with pretreated waste glass powder; adding sodium hydroxide and sodium pyrosulfite composite excitant solution; preparing the fly ash-waste glass powder inorganic polymer silt-solidifying material to solidify silt. By using this inorganic polymer to solidify silt, on one hand, the defect that the preparation process of traditional fly ash-waste glass powder inorganic polymer silt-solidifying material needs a great amount of cement for use is overcome, and environmental impact by the emission of industrial dust and greenhouse gases such as CO2 generated in cement production is decreased; on the other hand, the fly ash and waste glass powder solid wastes are used to prepare the silt-solidifying material, the industrial wastes such as the fly ash and the waste glass powder are fully recycled and are massively consumed, and the problem that a traditional backfilling method requires massive land and causes severe pollution to the surroundings while disposing these solid wastes is avoided.

The invention relates to the technical field of construction, in particular to a preparation method of an autoclaved aerated concrete slab. The preparation method of the autoclaved aerated concrete slab comprises the steps of slurry preparation, pouring, statical stop, cutting and autoclaved curing; and the slurry comprises the following ingredients in parts by weight: 4 to 7 parts of fried gypsumpowder, 8 to 12 parts of lime, 8 to 12 parts of cement, 45 to 55 parts of a siliceous material, 13 to 19 parts of phosphorus-containing waste residue, and 0.06 to 0.09 part of a gas former; accordingto the invention, the ingredients are reasonably prepared and the process is controlled, so that the internal and appearance quality of the product is improved, the use amounts of the lime and the cement are controlled to directly reduce the production cost, the static-stopping time is shortened to improve the production efficiency, and the use amounts of solid waste gypsum,fly ash, phosphorus slag and the like are increased.

The present invention provides a high-thermal-conductivity electronic package composite material and a preparation method thereof. The composite material is composed of insulating nano-particles and apolymer which have a volume ratio of 0.1 to 0.3. The insulating nano-particles are nano copper particles coated with a silicon dioxide insulating layer having a thickness of 10 to 100 nm. The nano copper particles each have a particle diameter of 50 to 500 nm. The preparation method comprises the steps of: preparing insulating nano copper particles; and then mixing the insulating nano copper particles with the polymer to form the high-thermal-conductivity electronic package composite material. The composite material provided by the invention can meet the requirements of the package filling for thermal conductivity and fluidity while satisfying the package insulation. The nano composite filling can significantly improve the heat dissipation performance of a device, reduce a thermal expansion coefficient, increase glass transition temperature, and greatly prolongs the electromigration failure time.

The invention discloses a high-performance automobile die casting aluminum alloy material and a preparation method thereof. The high-performance automobile die casting aluminum alloy material comprises the following components of, by mass, 8%-9% of Si, 0.5%-0.8% of Fe, Cu 3.2%-3.8% of Cu, 0.15%-0.40% of Mn, less than or equal to 0.3% of Mg, less than or equal to 1.5% of Zn, 0.008%-0.02% of Sr, less than or equal to 0.05% of other single impurity element, less than or equal to 0.15% of impurity element total amount, and 84.2%-88.1% of Al. The preparation method of the high-performance automobile die casting aluminum alloy material comprises the following steps of material preparation, smelting, alloying, cooling and component adjustment, refining, standing and modification. According to thehigh-performance automobile die casting aluminum alloy material and the preparation method thereof, the composition proportion of the aluminum alloy material is optimized, so that die casting production is facilitated, sufficient strength is achieved so as to meet load requirements of an automobile die casting, and wide applicability is achieved.

The invention provides a filling master batch and a preparation method and application thereof and a polypropylene drawing material containing the filling master batch. The filling master batch is prepared from, by weight, 75%-88% of filler, 0.5%-2% of coupling agent, 5%-20% of low-melt-flow-index polyethylene, 3%-10% of high-melt-flow-index polyethylene and 2%-5% of polypropylene wax. The preparation method of the filling master batch comprises the steps that the filler and the coupling agent are mixed and react firstly, then the mixture is mixed with the other components, and then extrudingis carried out. The filling master batch has good high temperature resisting performance, can be used as the filling master batch of the polypropylene drawing material, the mechanical performance of the polypropylene drawing material is improved, and the fuming problem in the polypropylene drawing production process is relieved.

The invention discloses a method for achieving a great impression effect through a gravure device. The method comprises the following steps that firstly, gravure ink with the surface energy of 20-29 dyn/cm is selected to serve as base oil, gravure ink with the surface energy of 30-45 dyn/cm is selected to serve as surface oil, and a proper bottom oil gravure depth and a proper surface oil gravuredepth are selected; secondly, the bottom oil is printed on a printed material and cured; and finally, the surface oil is painted on the surface of the cured bottom oil and is cured. In the method, thegravure ink with the proper surface energy is selected to serve as the bottom oil and the surface oil, so that the surface oil can retract into particles on the bottom oil to achieve the great impression silk screen surface simulation effect while the requirement of gravure for fluidity of the ink is met. The properly selected gravure depths can meet surface effect requirements of different products. The idle gravure capacity is fully utilized, and the production efficiency is improved by 30% compared with that of an offset printing mode.

The invention provides a method for preparing the ultra-pure ammonium rhenate crystals with the controllable particle sizes, and belongs to the technical field of hydrometallurgy. According to the invention, the recrystallization treatment is carried out on an aqueous solution of the ammonium rhenate crude product by using a multi-step crystallization method, meanwhile, the crystallization temperature nodes are controlled to be 35-45 DEG C, 0-5 DEG C and 20-40 DEG C, so that the ultra-pure ammonium rhenate crystal with the purity being greater than or equal to 99.999% can be prepared, and theyield of the ultra-pure ammonium rhenate crystal can reach 90% or above. Meanwhile, the consistency of the particle sizes of the obtained ultra-pure ammonium rhenate crystals is ensured, and the grainsize of the crystal can be adjusted by adjusting the crystallization concentration, temperature, time, crystallization times and the like of the ammonium rhenate solution, so that the requirements ofdifferent purposes on the flowability of the ammonium rhenate crystal can be met. The method is suitable for the industrial continuous production, and can realize the high-efficiency and low-energy-consumption large-scale production of the ammonium rhenate crystals with ultrahigh purity and controllable particle sizes.

The invention discloses a design method of mix proportion of LC50-LC80 lightweight high-strength silicate ceramsite concrete, and belongs to the technical field of concrete preparation. The absolute volume fractions of components of each cubic meter of silicate ceramsite concrete are determined by an absolute volume fraction linear method as follows: composite cementing material absolute volume fraction is V composite cementing material, shell silicate ceramsite absolute volume fraction is V ceramsite, water absolute volume fraction is V water, and river sand absolute volume fraction is V river sand, wherein the V composite cementing material is composed of V cement, V silica fume, V fly ash and V slag. The design method of the mix proportion of the silicate ceramsite concrete is simple, practical, effective and accurate, and has important theoretical significance and practical value for promoting the application of silicate concrete in high-rise buildings and long-span bridges.

The invention discloses high-brightness finishing printing silica gel for silk screen printing. The high-brightness finishing printing silica gel is prepared from the following raw materials in parts by mass: 10 to 15 parts of a high-brightness finishing printing silica gel component A and 1 to 3 parts of a high-brightness finishing printing silica gel component B. The invention further discloses a preparation method of the high-brightness finishing printing silica gel for the silk screen printing. According to the high-brightness finishing printing silica gel and the preparation method thereof, the defects of the general bright finishing gel are overcome; the high-brightness finishing gel with an outstanding brightness effect, high debubbling effect, urgent baking resistance, and zero hard spots and bubbles on a baked product is prepared; the finishing gel can be used for large-pattern printing finishing, to meet the requirement for the flowability, and also used for small-pattern finishing, to meet the requirement for avoiding smudging of a fillet.

The invention relates to a community full underground type resource cyclic utilization system for sewage and solid trash. The community full underground type resource cyclic utilization system is characterized by comprising a membrane enrichment unit, a trash pretreatment system and a supercritical reaction system which are arranged on the first floor underground, a sewage treatment pool and a trash storage pool which are arranged on the second floor underground, and a control system arranged in a ground central control room; the control system comprises sensors, on-site execution parts, a controller and an upper computer; the on-site execution part is electrically connected with the controller; the sensor, the controller and the upper computer are in signal connection; the sensors and the on-site execution parts are arranged on an oxidizing agent conveying pipeline, a fuel conveying pipeline, a material conveying pipeline, a reactor, a gas-stage product discharge unit and a liquid-stage product discharge unit. The community full underground type resource cyclic utilization system can treat sewage and solid trash at the same time, solid trash is not treated through incineration any more, pollutant discharge is reduced, the control processes such as start, stop, emergency stop, temperature regulation and pressure regulation of the system are achieved through a control unit, and data generated when the system runs can be effectively collected, stored and analyzed.